Gas holder-free biogas pressure increasing and stabilizing system

Abstract

The utility model discloses a gasholder-free biogas pressure increasing and stabilizing system which comprises an anaerobic jar, the output end of the anaerobic jar is connected with a cyclone steam-water separator through a pipeline I, the output end of the cyclone steam-water separator is connected with a biogas safety water seal through a pipeline II, the output end of the biogas safety water seal is connected with a buffer tank through a pipeline III, and the buffer tank is connected with a gas storage tank through a pipeline III. A first pressure transmitter is fixedly connected to the third pipeline, the output end of the buffer tank is connected with a filter through a fourth pipeline, the output end of the filter is connected with a biogas booster fan through a fifth pipeline, and the output end of the biogas booster fan is connected with a surge tank through a sixth pipeline. The other end of the surge tank is fixedly connected with a pipeline VII, and the pipeline VII is fixedly connected with a second pressure transmitter and a biogas regulating valve respectively. The device can replace a biogas pressurization gas holder, saves equipment investment cost of project construction, is not provided with the biogas pressurization gas holder, is small in occupied area, and saves land.

Description

Technical Field

[0001] The utility model relates to the technical field of biogas utilization, in particular to a biogas pressure stabilization system without a gas cabinet. Background Art

[0002] After nearly 30 years of vigorous development, my country's biogas utilization has gradually developed from small-scale biogas digesters in rural areas to large-scale industrial biogas generators with a single tank capacity of more than 5,000 cubic meters. With the increase in biogas production and the maturity of biogas utilization technology, biogas gas holders are indispensable in the current biogas utilization technology. The generated biogas is temporarily stored in the gas holder after preliminary dehydration and then sent to the biogas utilization equipment through a booster fan.

[0003] Under the increasingly stringent safety management situation, biogas tanks are inherently dangerous, and the surrounding design spacing requirements cannot be met by the technical transformation projects of old enterprises, which also makes it difficult to promote the technical transformation projects of old enterprises. At the same time, due to the explosion-proof requirements, the one-time investment cost of equipment is relatively large.

[0004] In the existing biogas boosting and transportation technology, the conventional method is to control the operating frequency of the fan by the pressure after the fan is boosted. Utility Model Content

[0005] The utility model aims to provide a biogas pressure stabilization system without a gas cabinet to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas cabinet-free biogas pressure-increasing and stabilizing system, comprising an anaerobic tank, wherein the output end of the anaerobic tank is connected to a cyclone steam-water separator through a pipeline one, the output end of the cyclone steam-water separator is connected to a biogas safety water seal through a pipeline two, the output end of the biogas safety water seal is connected to a buffer tank through a pipeline three, and a first pressure transmitter is fixedly connected to the pipeline three, the output end of the buffer tank is connected to a filter through a pipeline four, the output end of the filter is connected to a biogas booster fan through a pipeline five, the output end of the biogas booster fan is connected to a pressure-stabilizing tank through a pipeline six, the output end of the pressure-stabilizing tank is fixedly connected to a pipeline seven, and a second pressure transmitter and a biogas regulating valve are respectively fixedly connected to the pipeline seven.

[0007] The anaerobic tanks are provided in plurality.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. The utility model can replace the biogas booster gas tank, saving the equipment investment cost of project construction.

[0010] 2. The utility model does not have a biogas booster tank, occupies a small area and saves land.

[0011] 3. The utility model eliminates the biogas booster gas tank, reduces the safety risks brought by biogas storage, and achieves the inherent safety of the project.

[0012] 4. The utility model has a simple device structure and reduces subsequent management costs.

[0013] 5. The utility model is aimed at the technical transformation project of the old factory area, and the transformation is simple and easier to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the utility model.

[0015] In the figure: 1. Anaerobic tank; 2. Cyclone steam-water separator; 3. Biogas safety water seal; 4. First pressure transmitter; 5. Buffer tank; 6. Filter; 7. Biogas booster fan; 8. Pressure regulating tank; 9. Second pressure transmitter; 10. Biogas regulating valve. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1 The utility model provides a technical solution: a gas cabinet-free biogas pressure-increasing and stabilizing system, comprising an anaerobic tank 1, the output end of the anaerobic tank 1 is connected to a cyclone steam-water separator 2 through a pipeline 1, the output end of the cyclone steam-water separator 2 is connected to a biogas safety water seal 3 through a pipeline 2, the output end of the biogas safety water seal 3 is connected to a buffer tank 5 through a pipeline 3, and a first pressure transmitter 4 is fixedly connected to the pipeline 3, the output end of the buffer tank 5 is connected to a filter 6 through a pipeline 4, the output end of the filter 6 is connected to a biogas booster fan 7 through a pipeline 5, the output end of the biogas booster fan 7 is connected to a pressure-stabilizing tank 8 through a pipeline 6, the other end of the pressure-stabilizing tank 8 is fixedly connected to a pipeline 7, and a second pressure transmitter 9 and a biogas regulating valve 10 are respectively fixedly connected to the pipeline 7.

[0018] A plurality of anaerobic tanks 1 are provided.

[0019] Anaerobic tank 1: A highly efficient multi-stage internal circulation anaerobic reaction tank, which has the characteristics of small footprint, high organic load, strong impact resistance, stable performance and simple operation and management. Anaerobic tank is mainly used for organic high-concentration wastewater treatment, converting organic matter into biogas through anaerobic reaction.

[0020] Cyclone water separator 2: The function of the water separator is to reduce the water content in the biogas to the water content required for subsequent treatment. In addition, it can also remove the foam and dirt brought out by the fermentation device in the biogas to ensure the purity of the biogas.

[0021] Biogas safety water seal 3: Biogas safety water seal mainly plays the role of a check valve to prevent biogas backfire and ensure system safety. At the same time, it can also ensure that the biogas has a certain humidity and cool down the medium and high temperature biogas.

[0022] The first pressure transmitter 4: The first pressure transmitter is installed on the pipeline at the outlet of the biogas safety water seal to monitor the biogas pressure at this point in real time. It converts the pressure signal into an electrical signal and transmits it to the control system to provide a basis for the control of the biogas booster fan.

[0023] Buffer tank 5: The buffer tank is mainly used to buffer the pressure fluctuation of the system to make the biogas delivery more stable. It realizes the buffer function by compressing the air in the tank to improve the stability and reliability of the system.

[0024] Filter 6: The filter is used to remove impurities and particulate matter that may exist in the biogas to ensure the purity of the biogas and the normal operation of subsequent equipment.

[0025] Biogas booster fan 7: Biogas booster fan is a key device for increasing biogas pressure. After biogas is produced, the booster fan can extract biogas from the anaerobic tank in time and transport the biogas to subsequent equipment or storage devices through boosting effect.

[0026] Pressure stabilizing tank 8: The pressure stabilizing tank is used to stabilize the biogas pressure and ensure that the biogas can be delivered to the gas point at a constant pressure. It cooperates with the biogas booster fan and the biogas regulating valve to achieve stable delivery of biogas.

[0027] Second pressure transmitter 9: The second pressure transmitter is installed on the pipeline at the outlet of the pressure regulating tank to monitor the biogas pressure at this point in real time. It converts the pressure signal into an electrical signal and transmits it to the control system to provide a basis for the control of the biogas regulating valve.

[0028] Biogas regulating valve 10: Biogas regulating valve is a key device for controlling the amount of biogas delivered. It adjusts the valve opening according to the signal sent by the control system, thereby controlling the flow and pressure of biogas and ensuring that biogas can be stably delivered to the gas consumption point.

[0029] In the case that it is impossible to set up a biogas gas cabinet in the old plant area, the smooth transportation of biogas can be achieved by coupling two sets of control logic. The specific operation steps are as follows:

[0030] Booster fan control:

[0031] Biogas is generated from the anaerobic tank 1, which is a non-pressure-bearing device. In the prior art, it is temporarily stored in a biogas gas holder. In the absence of a storage tank, a fan is needed to bring the biogas out of the anaerobic tank 1 in time. Therefore, the first set of control logic is set at the biogas booster fan 7, and the pressure control point of the booster fan is set at the outlet of the biogas safety water seal 3. The fan frequency is controlled by pressure to stabilize the biogas pressure in front of the fan.

[0032] Control of biogas after the fan:

[0033] The biogas is pressurized by the fan and sent to the boiler at the gas consumption point. A pressure control point is set before the gas consumption point. The second set of control logic is set at the biogas regulating valve 10. The pipeline pressure is used to control the opening of the biogas regulating valve 10 to stabilize the biogas pressure in the pipeline between the biogas booster fan 7 and the boiler.

[0034] Through the coupling of the above two sets of control logics, the buffering and temporary storage functions of the biogas gas cabinet can be completely replaced, and the pressure-stabilizing transportation technology of biogas without a gas cabinet can be solved.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biogas pressure stabilization system without a gas cabinet, comprising an anaerobic tank (1), characterized in that: The output end of the anaerobic tank (1) is connected to a cyclone steam-water separator (2) via a pipe 1, the output end of the cyclone steam-water separator (2) is connected to a biogas safety water seal (3) via a pipe 2, the output end of the biogas safety water seal (3) is connected to a buffer tank (5) via a pipe 3, and a first pressure transmitter (4) is fixedly connected to the pipe 3, the output end of the buffer tank (5) is connected to a filter (6) via a pipe 4, and the output end of the filter (6) is connected to a biogas booster fan (7) via a pipe 5.

2. The biogas pressure stabilization system without a gas cabinet according to claim 1 is characterized by: The anaerobic tanks (1) are provided in a plurality.

3. The biogas pressure stabilization system without a gas cabinet according to claim 1 is characterized by: The output end of the biogas booster fan (7) is connected to a pressure stabilizing tank (8) via a pipeline (6).

4. The biogas pressure stabilization system without a gas cabinet according to claim 3 is characterized by: The output end of the pressure stabilizing tank (8) is fixedly connected to a pipeline seven, and the pipeline seven is respectively fixedly connected to a second pressure transmitter (9) and a biogas regulating valve (10).

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